Write a landing page for an ad

I work in marketing at a construction firm. Help me write the landing page an ad sends people to.

Context: Someone who clicked an ad wants to confirm the firm does this work in their area, see proof from similar projects and find out how to get a quote.

Before you start, ask me for anything missing from this list:
- The ad
- The offer
- The form or booking step
- Proof we can show

Then:
1. Repeat the ad's promise in the headline.
2. Remove every link that is not the one action.
3. Answer the three doubts that stop people.

Give me:
- Headline
- Page copy under 300 words
- Form fields to keep and to cut

Rules:
- Use only the facts I give you. Where something is missing, write [detail needed]. Never invent a number, a name, a quote or a source.
- Describe building work in general terms only. Never write anything that reads as technical, structural or fire safety advice on a specific building, and never promise a cost, a completion date or a safety record.
- Write in plain English, in our voice if I have given you a sample.
- Do not tell me what the rules or regulations say. If something may be restricted, flag it and I will check.

Finish with a list headed "Check before this goes out". Include these, plus anything else the director who approves marketing or our health, safety and quality lead should see:
- Terms behind any 'free survey', 'fixed price' or guarantee wording
- Accreditation logos and project photos, each cleared for use
- What the form says will happen to the person's details